a-a a-b a-c a-t aaa aab aac aao aap aar aas aat ab- aba abb abc abo abp abr abs abt ac- aca acb acc aco acp acr acs act aoa aob aoc aoo aop aor aos aot ap- apa apb apc apo app apr aps apt ar- ara arb arc aro arp arr ars art as- asa asb asc aso asp asr ass ast at- ata atb atc ato atp atr ats att b-p baa bab bac bao bap bar bas bat bba bbb bbc bbo bbp bbr bbs bbt bca bcb bcc bco bcp bcr bcs bct boa bob boc boo bop bor bos bot bpa bpb bpc bpo bpp bpr bps bpt bra brb bro brp brr brs brt bsa bsb bsc bso bsp bsr bss bst bta btb btc bto btp btr bts btt c-- caa cab cac cao cap car cas cat cba cbb cbc cbo cbp cbr cbs cbt cca ccb ccc cco ccp ccr ccs cct co- coa cob coc coo cop cor cos cot cpa cpb cpc cpo cpp cpr cps cpt cra crb crc cro crp crr crs crt csa csb csc cso csp csr css cst cta ctb ctc cto ctp ctr cts ctt oaa oab oac oao oap oar oas oat ob- oba obb obc obo obp obr obs obt oc- oca ocb occ oco ocp ocr ocs oct oo- ooa oob ooc ooo oop oor oos oot op- opa opb opc opo opp opr ops opt or- ora orb orc oro orp orr ors ort os- osa osb osc oso osp osr oss ost ot- ota otb otc oto otp otr ots ott p-p paa pab pac pao pap par pas pat pba pbb pbc pbo pbp pbr pbs pbt pca pcb pcc pco pcp pcr pcs pct poa pob poc poo pop por pos pot ppa ppb ppc ppo ppp ppr pps ppt pra prb prc pro prp prr prs prt ps- psa psb psc pso psp psr pss pst pt- pta ptb ptc pto ptp ptr pts ptt ra- raa rab rac rao rap rar ras rat rba rbb rbc rbo rbp rbr rbs rbt rca rcb rcc rco rcp rcr rcs rct roa rob roc roo rop ror ros rot rpa rpb rpc rpo rpp rpr rps rpt rra rrb rrc rrp rrr rrs rrt rsa rsb rsc rso rsp rsr rss rst rta rtb rtc rto rtp rtr rts rtt saa sab sac sao sap sar sas sat sba sbb sbc sbo sbp sbr sbs sbt sca scb scc sco scp scr scs sct soa sob soc soo sop sor sos sot spa spb spc spo spp spr sps spt sr- sra srb src sro srp srr srs srt ss- ssa ssb ssc sso ssp ssr sss sst sta stb stc sto stp str sts stt taa tab tac tao tap tar tas tat tba tbb tbc tbo tbp tbr tbs tbt tca tcb tcc tco tcp tcr tcs tct to- toa tob toc too top tor tos tot tpa tpb tpc tpo tpp tpr tps tpt tra trb trc tro trp trr trs trt tsa tsb tsc tso tsp tsr tss tst tta ttb ttc tto ttp ttr tts ttt

aaaa aaab aaac aaap aaar aaas aaba aabb aabc aabp aabt aaca aacb aacc aaco aacp aacr aacs aact aaoo aapa aapc aapo aaps aapt aara aarc aaro aarp aars aart aasa aasc aass aast aata aatc aatt abaa abab abac abap abar abas abat abb- abba abbb abbo abbr abbs abbt abca abcb abcc abcp abcr abcs abct aboa abob aboo abor abos abot abpa abpc abpp abpr abps abra abrc abro abrs abs- absa absp abss abta abts ac-t acaa acab acac acap acar acas acat acba acca accc acco accp accs acct acoa acop acor acos acot acpa acpr acps acpt acr- acra acrc acro acrr acrs acsa acsc acss acst acta actc acto acts actt aoba aoca aocs aopo aora aorb aors aort aosp aoss aotc apac apao apap apar apas apat apba apbr apbs apca apcb apcc apco apcr apcs apo- apoc apoo apop apor apos apot appa appc appr apps appt apra aprc apro aprs aprt apsa apso apss apta aptc apts aptt arab arac arap arar aras arat arba arbs arc- arca arco arcs arct aroa arob aroo aror aros arpa arps arr- arra arrc arro arrr arrs arrt ars- arsa arsc arso arst arta artc arto artr arts asaa asab asac asao asap asar asas asat asba asbo asc- asca ascb ascc asco ascp ascr asct asob asoc asop asor asos asot aspa aspc aspo aspr asps aspt asra asrc asro asrs assa assc asso assp assr asss asst asta astb astc asto astp astr asts at-t ataa atab atac atap atar atas atat atbs atca atcc atco atcr atcs atob atoc atop ator atos atot atpr atra atrc atro atrp atsb atsc atst atta atto attp attr atts baaa baar baas baat baba babb babo babr babs bac- baca bacc baco bacs bact baos bapa bapc bapp baps bapt bar- bara barb barc baro barr bars bart basa basc baso bass bast bata batc bato bats batt bbas bbbb bbbs bbpr bbrc bcaa bcap bcar bcas bcat bcbc bcbp bcbs bcca bccc bccs bcor bcos bcpp bcps bcra bcrs bcsa bcsc bcss bctc bcts boab boac boar boas boat boba bobb bobo bobs boca boco bocs boob booc boop boor boos boot bopa bopp bops bor- bora boro borr bors bort bosa bosc boso boss bost bota botb boto bots bott bpcp bpot bprc bpsa brab brac brao bras brat brca brcb broa brob broc broo bror bros brot brrr brrs brsb brsr brst brtc bsaa bsac bsap bsas bsat bscp bscs bsos bspp bspr bsra bssc bsts btaa btbp btcc btcs btob btor btps btrc btrt btss bttb c-bo caaa caab caac caap caas caat caba cabo cabs cac- caca cacc caco cacr caor caos capa capb capc capo capp caps capt cara